I also have my own spin on gender bender in my comic, although I don't have very much to read at this time, and I'm going about it differently than most comics tend to. I make no promises that you;ll like it.

But you ought to Like El Goonish Shive and Wotch. Check them out._________________My webcomic: Mischief in Maytia
http://maytiacomic.com/

Throw "Rain LGBT" on the list.
(Apparently I can't link on my first post.. defuq? Just google it or go to Smackjeeves and put it in as a search)

You could add "Wildflowers - A Transgender Webcomic" on there too.
(Also on smackjeeves, and comicfury)
If nothing else, hit up the 'Other Stuff I Read' on Wildflowers, I linked all of the trans* webcomics I could there.